import java.io.*;
import java.util.*;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User:
 * Date: 2025-09-26
 * Time: 10:19
 */
class Read{
    StringTokenizer st = new StringTokenizer("");
    //InputStream在这里的作用是什么？
    BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));


    //这个方法作用详细展开说说？
    String next() throws IOException {
        while(!st.hasMoreTokens()){
            st = new StringTokenizer(bf.readLine());
        }
        return st.nextToken();
    }

    //这些方法的详细讲解？
    String nextLine() throws IOException {
        return bf.readLine();
    }

    int nextInt() throws IOException {
        return Integer.parseInt(next());
    }

    long nextLong() throws IOException {
        return Long.parseLong(next());
    }

    double nextDouble() throws IOException {
        return Double.parseDouble(next());
    }

}


public class demo1 {

    public static PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
    public static Read in = new Read();

    public static void main(String[] args) {

        out.close();
    }

}
